A transmission for a vehicle may include a first input shaft continuously receiving torque from a power source and having a first input transfer gear thereon, a second input shaft selectively receiving torque from the power source through a clutch and having a second input transfer gear thereon, a coupling member allowing or restricting rotation of the first input transfer gear relative to the first input shaft, a first countershaft and a second countershaft each having an output transfer gear to be engaged with the first input transfer gear and the second input transfer gear, and coupling devices selectively coupling the output transfer gears to corresponding countershafts and allowing torque from the power source to be transmitted to a desired shift gear by coupling output transfer gears connected to the desired shift gear in the output transfer gears to a corresponding countershaft in advance or after synchronization in shifting.

A power transmitting apparatus for a vehicle achieves seven forward speeds with a minimal number of input gears disposed on input shafts, since the second speed gear and the fourth speed gear are simultaneously engaged with the second input gear and the third speed gear and the seventh speed gear are simultaneously engaged with the third input gear, and distortion of step ratios at the high-speed region may be prevented.

A powershift transmission for agricultural machines, which is of modular design and has a first part (1) with a splitter group (3) and a second part (2) with a multi-speed transmission (4). The splitter group (3) is designed such that the rotational direction of the input shaft (5) and the rotational direction of the output shaft (8) remain the same, even when shifts are carried out in the splitter group (3).

A power transmission apparatus includes a first/second/third rotary shaft, and a positioning member. The first rotary shaft is connected to an output shaft of a drive source. The second rotary shaft is spline-fitted to a rotary shaft of an electric motor. The third rotary shaft is connected to the first rotary shaft and the second rotary shaft. The positioning member is configured to apply an elastic force in a rotational direction to the rotary shaft and the second rotary shaft in a portion where the rotary shaft and the second rotary shaft overlap each other; set each of a position in the rotational direction of a spline of the rotary shaft of the electric motor and a spline of the second rotary shaft to a specified position, and applies the elastic force in the rotational direction to the rotary shaft and the second rotary shaft.

A power transmission apparatus includes a first/second/third rotary shaft, and a positioning member. The first rotary shaft is connected to an output shaft of a drive source. The second rotary shaft is spline-fitted to a rotary shaft of an electric motor. The third rotary shaft is connected to the first rotary shaft and the second rotary shaft. The positioning member is configured to apply an elastic force in a rotational direction to the rotary shaft and the second rotary shaft in a portion where the rotary shaft and the second rotary shaft overlap each other; set each of a position in the rotational direction of a spline of the rotary shaft of the electric motor and a spline of the second rotary shaft to a specified position, and applies the elastic force in the rotational direction to the rotary shaft and the second rotary shaft.

A transmission includes a first power transmitting path of gears that obtains odd number speeds and has an output part, a second power transmitting path of gears that obtains even number speeds and has an output part; a first gear shifting part incorporated in the first power transmitting path to obtain one of the odd number speeds, a second gear shafting part incorporated in the second power transmitting path to obtain one of the even number speeds, and a path shifting part that is arranged between the first and second power transmitting parts. The path shifting part shifts the first second power transmitting paths to output power to the output shaft.

A constant mesh gearbox has five parallel rotational axes. The input and output axes are not aligned. Up to eight forward speeds are disclosed, with two very low ratios suitable for non-highway travel. The transmission is suitable for two and four wheel drive.

A transmission for a hybrid vehicle includes an input shaft connected to an engine, an output shaft disposed in parallel with the input shaft, a first hollow shaft installed on an outer peripheral surface of one side of the input shaft, a second hollow shaft installed on an outer peripheral surface of the other side of the input shaft, a first motor connected to the first hollow shaft, a second motor connected to the second hollow shaft, a first speed-shifting output part provided between the first hollow shaft and the output shaft, a second speed-shifting output part provided between the second hollow shaft and the output shaft, a first synchronizer synchronously connecting the first hollow shaft to the first speed-shifting output part, and a second synchronizer synchronously connecting the second hollow shaft to the second speed-shifting output part.

A power train for a hybrid vehicle may include a first transmission mechanism receiving a selective input of a power of an engine, and gear-shifting and transferring the power provided from the engine to a drive shaft through selection of engine-side gear mates that meet a traveling speed among a plurality of engine-side gear mates through a first control device, and a second transmission mechanism receiving an input of a power of a motor, and gear-shifting and transferring the powers provided from the engine and the motor to the drive shaft through selection of a motor-side gear mates that meet a traveling mode or the traveling speed among a plurality of motor-side gear mates through a second control device, wherein the second control device of the second transmission mechanism maintains one of the motor-side gear mates in a normally connected state to the drive shaft during traveling of the vehicle.

A powertrain may include a plurality of shafts disposed in parallel with a transmission input shaft of a first shifting mechanism which receives power from an engine, and transmitting power from a motor to a driving shaft while a vehicle is driven; and a second shifting mechanism including a plurality of gears fitted on the shafts, in which one of the gears remains engaged and rotated as a driven gear by a constant synchronizer while the vehicle is driven.